chore: setup folders for aoc 2024

aoc2023/day01/example1.txt

@@ -0,0 +1,4 @@
+1abc2
+pqr3stu8vwx
+a1b2c3d4e5f
+treb7uchet

aoc2023/day01/example2.txt

@@ -0,0 +1,7 @@
+two1nine
+eightwothree
+abcone2threexyz
+xtwone3four
+4nineeightseven2
+zoneight234
+7pqrstsixteen

aoc2023/day01/main.go

@@ -0,0 +1,102 @@
+package main
+
+import (
+	"bufio"
+	_ "embed"
+	"fmt"
+	"strings"
+
+	aoc "go.sour.is/advent-of-code"
+)
+
+func main() { aoc.MustResult(aoc.Runner(run)) }
+
+type result struct {
+	sum  int
+	sum2 int
+}
+
+func (r result) String() string {
+	return fmt.Sprintln("result pt1:", r.sum, "\nresult pt2:", r.sum2)
+}
+
+var numbers = []string{"zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"}
+
+func run(scan *bufio.Scanner) (*result, error) {
+	result := &result{}
+
+	for scan.Scan() {
+		var first, last int
+		var first2, last2 int
+
+		text := scan.Text()
+
+		slice := make([]rune, 5)
+		for i := range text {
+			copy(slice, []rune(text[i:]))
+
+			switch {
+			case slice[0] >= '0' && slice[0] <= '9':
+				if first == 0 {
+					first = int(slice[0] - '0')
+				}
+				if first2 == 0 {
+					first2 = int(slice[0] - '0')
+				}
+			default:
+				if first2 != 0 {
+					continue
+				}
+
+				for i, s := range numbers {
+					if strings.HasPrefix(string(slice), s) {
+						first2 = i
+						break
+					}
+				}
+			}
+			if first != 0 && first2 != 0 {
+				break
+			}
+		}
+
+		text = string(aoc.Reverse([]rune(text)))
+
+		for i := range text {
+			copy(slice, []rune(text[i:]))
+			slice = aoc.Reverse(slice)
+
+			switch {
+			case slice[4] >= '0' && slice[4] <= '9':
+				if last == 0 {
+					last = int(slice[4] - '0')
+				}
+				if last2 == 0 {
+					last2 = int(slice[4] - '0')
+				}
+			default:
+				if last2 != 0 {
+					continue
+				}
+				for i, s := range numbers {
+					if strings.HasSuffix(string(slice), s) {
+						last2 = i
+						break
+					}
+				}
+
+			}
+			if last != 0 && last2 != 0 {
+				break
+			}
+		}
+
+		result.sum += first*10 + last
+		result.sum2 += first2*10 + last2
+	}
+	if err := scan.Err(); err != nil {
+		return nil, err
+	}
+
+	return result, nil
+}

aoc2023/day01/main_test.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"bufio"
+	"bytes"
+	"testing"
+
+	_ "embed"
+
+	"github.com/matryer/is"
+)
+
+//go:embed example1.txt
+var example1 []byte
+
+//go:embed example2.txt
+var example2 []byte
+
+//go:embed input.txt
+var input []byte
+
+func TestExample1(t *testing.T) {
+	is := is.New(t)
+	scan := bufio.NewScanner(bytes.NewReader(example1))
+
+	result, err := run(scan)
+	is.NoErr(err)
+
+	t.Log(result)
+	is.Equal(result.sum, 142)
+}
+
+func TestExample2(t *testing.T) {
+	is := is.New(t)
+	scan := bufio.NewScanner(bytes.NewReader(example2))
+
+	result, err := run(scan)
+	is.NoErr(err)
+
+	t.Log(result)
+	is.Equal(result.sum2, 281)
+}
+func TestInput(t *testing.T) {
+	is := is.New(t)
+	scan := bufio.NewScanner(bytes.NewReader(input))
+
+	result, err := run(scan)
+	is.NoErr(err)
+
+	t.Log(result)
+	is.Equal(result.sum, 54573)
+	is.Equal(result.sum2, 54591)
+}